I thought I’d read that one shouldn’t refer to the date or the year in a submission, but now I’m reviewing one with the year in the description and I can’t find that rule or suggestion in Wayfarer.
It depends if it’s relevant and future proof. I’d really have to see it to make a judgement 
If it’s the year a time capsule was buried or references a historic event or the establishment of the nomination, then it would be fine. Gratuitous dates that would be used to identify a submitter or that aren’t relevant to the nomination or won’t make sense in a few years obviously would be a quality problem that should be rejected
This is the description - trail marker closing a trail
This sign was placed in 23/24 as part of the Ute Valley Master Plan. All trails on the west face of Rattlesnake Ridge are permanently closed.
Reading it again now the date seems relevant. When I was reading Wayfarer earlier I had read something about dates being a no-no and well, here we are.
Personally, I’d be more concerned with the other comments made for similar future-proofing reasons.
Why are they mentioning the closed trails in the description? That would be a supporting statement, at best, but it seems quite irrelevant to the nomination being made.
Also, If they’re only closed for a season or repairs or something, they may well be reopened, making this statement on another wayspot redundant at that time 
Thank you for your fast and thoughtful response. The trails were closed because they ran through sensitive bird breeding habitat and I was able to find online that the closure is permanent.
No worries.
That makes sense, but they probably should have included that info in the nomination (was that covered in the supporting details?). Pointing out which bird habitat/s the closures are protecting would have made for interesting details in the description IMO 
Some “bad” examples might be “…installed last week,” “…the trail opened 3 years ago,” or “…new trail opened recently.”
But I don’t think I’d reject outright for Accuracy, perhaps “I don’t know” since it might be true now but not in the future.